This application claims the benefit of Taiwan application Serial No. 109129197, filed Aug. 26, 2020, the subject matter of which is incorporated herein by reference.
The invention relates in general to a stylus and a charging method thereof and a computing device using the same, and more particularly to an active stylus and a charging method thereof and a mobile computing device using the same.
The mobile computing device can collocate with a stylus to provide the user with convenience in writing and drawing. In recent years, an active stylus is provided. The active stylus requires an independent battery whose size directly affects the duration of the active stylus.
Normally, the battery of the active stylus is replaceable. However, a heavy user of the stylus will be bothered with the frequent replacement of the battery. For the active stylus to be more practical, the research personnel are devoted to providing various wireless charging technologies with which the active stylus can be wirelessly charged.
The invention is directed to an active stylus and a charging method thereof and a mobile computing device using the same. A light-emitting area is determined according to the attitude or the position of the active stylus relative to the mobile computing device, such that the light-emitting area can correspond to the current attitude or position of the active stylus, and the solar panel of the active stylus can receive a light and charge the active stylus.
According to one embodiment of the present invention, a charging method of an active stylus is provided. The charging method of an active stylus includes the following steps. A wireless signal is emitted to a touch device of a mobile computing device by an active stylus to obtain an attitude or a position of the active stylus relative to the mobile computing device. The active stylus includes a solar panel. A light-emitting area of the mobile computing device is determined according to the attitude or the position of the active stylus relative to the mobile computing device. A light is emitted in the light-emitting area by a light-emitting unit of the mobile computing device, such that the solar panel of the active stylus receives the light for charging a battery of the active stylus.
According to another embodiment of the present invention, a mobile computing device is provided. The mobile computing device includes a touch device, a regional analysis unit, a light-emitting unit and a control unit. The touch device is configured to receive a wireless signal emitted by an active stylus to obtain an attitude or a position of the active stylus relative to the mobile computing device. The active stylus includes a solar panel. The regional analysis unit is configured to obtain a light-emitting area according to the attitude or the position of the active stylus relative to the mobile computing device. The control unit is configured to control the light-emitting unit to emit a light in the light-emitting area, such that the solar panel of the active stylus receives the light for charging the active stylus.
According to an alternate embodiment of the present invention, an active stylus is provided. The active stylus includes a battery, a solar panel, a processing unit and a emission unit. The solar panel is connected to the battery. The processing unit is configured to analyze an attitude or a position of the active stylus relative to a mobile computing device. The emission unit is configured to emit a wireless signal to a touch device of the mobile computing device, such that the mobile computing device obtains the attitude or the position and makes a light-emitting unit of the mobile computing device area emit a light in a light-emitting area. The solar panel of the active stylus receives the light for charging the active stylus.
The above and other aspects of the invention will become better understood with regard to the following detailed description of the preferred but non-limiting embodiment(s). The following description is made with reference to the accompanying drawings.
Referring to
In the present embodiment, the light-emitting area RG does not have to be fixed at a specific position. The mobile computing device 100 can determine the light-emitting area RG according to an attitude or a position of the active stylus 200 relative to the mobile computing device 100, such that the light-emitting area RG can correspond to the current attitude or position of the active stylus 200 and make the solar panel 230 of the active stylus 200 receive the light L1 and charge the active stylus 200.
Referring to
The solar panel 230 is connected to the battery 210. The processing unit 240 is configured to analyze an attitude S1 or a position S2 of the active stylus 200 relative to the mobile computing device 100. The emission unit 250 is configured to transmit the attitude S1 or the position S2 to the mobile computing device 100.
The touch device 150 of the mobile computing device 100 is configured to receive the wireless signal emitted by the active stylus 200. The mobile computing device 100 performs calculation to obtain the attitude S1 or the position S2 of the active stylus 200 according to the wireless signal. The wireless signal can be realized by a Bluetooth signal, a Wi-Fi signal, or a UWB signal. Or, the active stylus 200 can directly operate on the touch device 150 to calculate the attitude S1 or the position S2 of the active stylus 200 through the electrodes disposed on the touch device 150. The regional analysis unit 120 is configured to obtain a light-emitting area RG of the mobile computing device 100 according to the attitude S1 or the position S2 of the active stylus 200.
The control unit 130 is configured to control the light-emitting unit 150 to emit the light L1 in the light-emitting area RG, such that the solar panel 230 of the active stylus 200 receives the light L1 for charging the battery 210 of the active stylus 200.
Operations of the mobile computing device 100 and the active stylus 200 are disclosed below with an accompanying flowchart. Referring to
Referring to
The attitude S1 or the position S2 of the active stylus can be obtained by analyzing the active content and the passive content of the active stylus 200. Examples of the active content include the identification code, the state information (such as the weight, the length, the width, the height, the shape, the inclination, the rotation, the suspension, and the pressure of the stylus), and the electrical signal of the stylus (such as the number, the strength and the frequency of the signal). The passive content includes the information of the stylus detected by the sensor.
Next, in step S120, a light-emitting area RG of the mobile computing device 100 is obtained according to the attitude S1 or the position S2 of the active stylus 200 relative to the mobile computing device 100.
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The said light-emitting unit 140 can be realized by an LED indicator, an LCD backlight module or an OLED, each can be used as a source of a high-luminance light. The current outputted by the solar panel 230 is relevant to the luminance. According to the present design, the light-emitting unit 140 provides a high-luminance light at a short distance to increase the charging efficiency.
Then, in step S130, a light L1 is emitted in the light-emitting area RG by the light-emitting unit 140, such that the solar panel 230 of the active stylus 200 receives the light L1 for charging the active stylus 200.
According to the above embodiments, when the active stylus 200 gets closer to the mobile computing device 100, the mobile computing device 100 can irradiate a light on the solar panel 230 at a short distance to perform a non-contact light charging on the battery 210 without using a charging cable.
Besides, since the active stylus 200 and the mobile computing device 100 do not require any charging contact points, the external appearance can be simplified and the aesthetics of the external appearance can be maintained.
Moreover, since the active stylus 200 is charged using the light, the existing backlight module or light-emitting diode of the mobile computing device 100 can be used and there is no need to install any additional light source. In comparison to the design using wireless charging, the present design can save more elements.
Furthermore, the determination of the light-emitting area RG can provide the high-luminance light at a shortest distance, such that the charging efficiency can be optimized.
Additionally, various storage methods of the active stylus 200 (such as external absorption, external clamping, hidden type) are all based on the non-contact light charging method of the present design.
The present design can support the write and charge function, and when the electrical capacity of the active stylus is low, the user can continue to write with the active stylus which is being charged without having to place the active stylus at a specific position.
While the invention has been described by way of example and in terms of the preferred embodiment(s), it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Number | Date | Country | Kind |
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109129197 | Aug 2020 | TW | national |